EP1606565B1 - Absorber für einen thermischen kollektor einer solaranlage sowie verfahren zu dessen herstellung - Google Patents

Absorber für einen thermischen kollektor einer solaranlage sowie verfahren zu dessen herstellung Download PDF

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Publication number
EP1606565B1
EP1606565B1 EP04704203A EP04704203A EP1606565B1 EP 1606565 B1 EP1606565 B1 EP 1606565B1 EP 04704203 A EP04704203 A EP 04704203A EP 04704203 A EP04704203 A EP 04704203A EP 1606565 B1 EP1606565 B1 EP 1606565B1
Authority
EP
European Patent Office
Prior art keywords
absorber
plates
adhesive
tubing system
sheets
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP04704203A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1606565A1 (de
Inventor
Frieder Flamm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Flamm GmbH
Original Assignee
Flamm GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Flamm GmbH filed Critical Flamm GmbH
Priority to SI200430199T priority Critical patent/SI1606565T1/sl
Publication of EP1606565A1 publication Critical patent/EP1606565A1/de
Application granted granted Critical
Publication of EP1606565B1 publication Critical patent/EP1606565B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00—Solar heat collectors using working fluids
    • F24S10/50—Solar heat collectors using working fluids the working fluids being conveyed between plates
    • F24S10/503—Solar heat collectors using working fluids the working fluids being conveyed between plates having conduits formed by paired plates, only one of which is plane
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00—Solar heat collectors using working fluids
    • F24S10/50—Solar heat collectors using working fluids the working fluids being conveyed between plates
    • F24S10/504—Solar heat collectors using working fluids the working fluids being conveyed between plates having conduits formed by paired non-plane plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S25/00—Arrangement of stationary mountings or supports for solar heat collector modules
    • F24S25/60—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules
    • F24S2025/601—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules by bonding, e.g. by using adhesives
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers
    • Y02E10/44—Heat exchange systems

Definitions

  • the invention relates to an absorber for a thermal collector of a solar system with an absorber blade for the light and heat conversion and a pipe system for a heat transfer medium, in which between two superimposed, the absorber blade sheets forming the pipe system is arranged, wherein in at least one of the sheets of the course of the pipe system is introduced and the sheets are connected to each other by means of an adhesive.
  • Absorbers are components of solar systems.
  • Solar systems basically consist of a solar receiving surface, generally referred to as a collector, the solar circuit and the heat storage.
  • the collectors are regularly mounted on the roof of a house and convert the incoming solar radiation into heat.
  • the pump is automatically switched into the solar circuit via a controller if a temperature sensor signals that the temperature at the collector is higher than that in the heat accumulator.
  • the heat of the heat carrier is discharged to the storage water.
  • thermal collectors are used in particular. These are collectors that absorb the incoming solar radiation and convert it directly into heat.
  • Main component of each thermal collector is the absorber. This is a metallic, partly made of plastic, dark colored Plate. Since the solar radiation is not transmitted by the absorber and is hardly reflected, it largely converts to heat, which flows off via the pipe system connected to the absorber.
  • the absorber with the associated pipe system is located in a weatherproof housing with a glass cover. The enclosed by the glass cover of the housing and the absorber layer of air serves as a transparent thermal insulation in the direction of the incident solar radiation. An insulating layer placed under the absorber prevents heat losses over the housing bottom.
  • the pipe system arranged below the absorber plate regularly consists of a meander-shaped, pressure-resistant copper pipe which is connected in each case to a manifold in order to connect a plurality of collectors to one another.
  • the heat transfer via the linear weld is not optimal.
  • the company Solvis GmbH has developed a wide solder joint between the absorber plate and the absorber tube, which should bring about improved heat transfer.
  • the solder joint extends over a pitch circle at the top of the absorber tube; the solder joint is made by filling the gusset with solder between the pipe jacket and the bottom of the absorber.
  • the present invention seeks to provide an absorber with reduced manufacturing costs and improved dimensional stability while reducing the rejection rate at which occurring at high temperatures strength losses of the connection between the sheets of the absorber are compensated. Furthermore, the invention has for its object to propose a method for producing the improved absorber.
  • the sheets are connected by means of an adhesive as well as in addition form-fitting with each other.
  • the joining of the sheets by an adhesive significantly reduces the manufacturing costs, since soldering or welding work for the production of the absorber can be completely eliminated.
  • the joining of the sheets by an adhesive not only leads to a significant cost reduction, but also improves the dimensional stability of the solar collector while reducing the rejection rate.
  • the use of energy is significantly reduced in bonding compared to the previous bonding techniques.
  • the preferred adhesive is an adhesive from the group of silicones, epoxy or phenolic resin adhesives.
  • thermosetting adhesives based on modified epoxy resins have a high creep resistance to changing temperatures.
  • these adhesives have favorable processing conditions as well as strength and resistance properties for metal / metal compounds.
  • the sheets are at least in the inner surfaces of the pipe system forming area provided with a corrosion and / or oxidation-inhibiting coating.
  • the sheets are coated completely and on both sides.
  • Aluminum sheets are preferably anodized, while steel sheets are in particular provided with a copper or plastic coating. The coating ensures the desired longevity of the solar panels.
  • the absorber according to the invention does not necessarily have to consist of pure aluminum and should nevertheless be easy to produce in large quantities.
  • a method for the mass production of low-absorbency absorbers is to be proposed, which requires little energy and opens up a great deal of creative freedom with regard to the design of the pipe system.
  • the plates forming the absorber are connected to one another by means of an adhesive.
  • adhesives in particular one-component or two-component adhesives are used which are resistant to the heat transfer medium and at least maintain their adhesive properties in the temperature range between - 30 ° C and + 200 ° C.
  • the adhesive is applied in a preferred embodiment of the manufacturing method according to the invention not only after the shaping of the pipe system, but already on the particular band-shaped starting material of the absorber.
  • Such coated tapes can be like uncoated to the coil are wrapped without sticking together when it comes to temperature-dependent hot-melt adhesives.
  • the adhesive effect begins only after heating to a certain temperature.
  • the joining of the sheets by an adhesive allows the use of sheets with final thickness and final strength, which has an advantageous effect on the dimensional stability of the absorber with reduced rejection rate.
  • the use of energy is significantly reduced during bonding compared to conventional joining techniques, such as soldering or welding.
  • the adhesive can be rolled up with rollers or brushed with a squeegee or spatula-like tool.
  • the adhesive can also be sprayed in webs, the amount being metered so that after the joining of the sheets to be bonded no excess adhesive penetrates into the pipe system.
  • the course of the pipe system is in the way of cold-forming, in particular by deep drawing or embossing introduced, which can achieve a high cross-sectional repeat accuracy and a flexible arrangement of the heat transfer tubes in the superposed sheets of absorber, either one-sided, two-sided or reciprocally.
  • At least the surfaces of the sheets to be bonded are subjected to a surface treatment.
  • a surface treatment If aluminum sheets are used, it is recommended to use an anodized coating, which is produced by anodic oxidation of the aluminum sheet.
  • a copper or plastic coating can be applied as corrosion protection.
  • further mechanical and / or thermal surface treatments of the surfaces to be bonded can be carried out. Mechanical surface treatments (e.g., brushing) remove soils and rough the surface, which may be beneficial to the strength of the adhesive bond in certain adhesives.
  • the thermal surface treatment degreases the surface.
  • the assembled and cut to absorber size sheets are also positively connected with each other.
  • This additional connection fixes the sheets until a minimum hardening of the adhesive is achieved and relieves the adhesive bond during operation of the collector at high temperatures of the heat carrier.
  • effective interlocking joints (clinching / toxins) in the absorber plane produce effective interlocking joints on several surfaces distributed uniformly on the absorber surface, which provide the fixation required for adhesive curing and stabilization of the absorber under all operating conditions Maintains sheets.
  • the absorbers fixed in this way can immediately leave the press for the joining process and, if necessary, pass through a curing oven or cure under normal ambient conditions to the required final adhesive strength.
  • the sheets mechanically fixed in this way may be pressed and / or heated in addition.
  • the plates are laid on each other with elastic intermediate layers to form a stack, in order then to cure the required time under the pressure of a press and / or simultaneous application of temperature.
  • any post-processing such as stamping, bending, flanging and painting, will follow.
  • FIGS. 1 a, 1 b show, by way of example, a production line for producing an absorber according to the invention in a side view and a top view.
  • FIG. 2 shows a schematic section through a collector with absorber according to the invention:
  • the embodiment shows a 2-wire production line in which two sheets 1a, 1b are processed in parallel.
  • a coil 2a, 2b unraveled band-shaped sheets 1a, 1b are fed after straightening in each case a roller leveler 3a, 3b embossing stations 4a, 4b, which bring the course for the pipe system by embossing in both sheets.
  • a roller leveler 3a, 3b embossing stations 4a, 4b which bring the course for the pipe system by embossing in both sheets.
  • embossing stations 4a or 4b omitted; In this case, a flat sheet is joined together with an embossed sheet.
  • the adhesive is applied in both strands, each with a roller 5a, 5b arranged above the strip run. Only after the adhesive has been rolled up, the band-shaped sheets 1 a, 1 b with cutters 6 a, 6 b are cut to the size of the absorbers 8 to be produced in cutting stations 7 a, 7 b.
  • the produced in the two parallel production lines and cut to size of the absorber sheets 1a, 1b are brought together in a pressing tool 9 and at least at two points 11a, 11b by clinching (clinching / Toxen) in an effective in the sheet plane positive connection 12 in fixed their position to each other.
  • the absorbers thus fixed leave the pressing tool 9 again immediately and enter a curing station 13 in which they cure under the pressure of a press 14 and simultaneous application of heat in batches to the required final adhesive strength.
  • Between the thermosetting absorbers 8 are elastic intermediate layers 15, which prevent damage to both sides of the pronounced absorber tubes in the curing station 13. If the capacity of the curing station 13 can not absorb all the absorbers 8 that can be produced from the two coils 2a, 2b, a plurality of curing stations can be provided to secure a continuous production flow.
  • the transport of the sheets 1a, 1b between the cutting stations 7a, 7b, the pressing tool 9 and the curing station 13 advantageously takes place automatically, for example by means not shown in the figures for reasons of clarity funding and clocked gripping and lifting devices.
  • the generally designated 16 flat collector consists of a weatherproof housing 17 with a glass cover 18 through which the solar radiation 19 falls on the surface 21 of the absorber 22.
  • the preferably dark colored surface 21 largely converts the incident solar radiation 19 into heat, which flows off via the pipe system 23 integrated into the absorber 22, of which only two absorber tubes are shown in cross-section.
  • the course of the absorber tubes is introduced by cold forming in the interconnected via an adhesive layer 25 sheets.
  • the heat transfer medium, a frost-proof water-glycol mixture circulates in the absorber pipes.
  • An insulating layer 24 arranged under the absorber prevents heat losses via the bottom of the housing 17, while the air layer trapped by the glass cover 18 and the absorber 22 acts as a radiation-permeable heat insulation on the upper side of the absorber.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Laminated Bodies (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Photovoltaic Devices (AREA)
  • Treating Waste Gases (AREA)
EP04704203A 2003-02-19 2004-01-22 Absorber für einen thermischen kollektor einer solaranlage sowie verfahren zu dessen herstellung Expired - Lifetime EP1606565B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200430199T SI1606565T1 (sl) 2003-02-19 2004-01-22 Absorber toplotnega kolektorja solarne naprave in postopek izdelave le-tega

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10306930 2003-02-19
DE10306930A DE10306930B3 (de) 2003-02-19 2003-02-19 Absorber für einen thermischen Kollektor einer Solaranlage sowie Verfahren zu dessen Herstellung
PCT/EP2004/000474 WO2004074749A1 (de) 2003-02-19 2004-01-22 Absorber für einen thermischen kollektor einer solaranlage sowie verfahren zu dessen herstellung

Publications (2)

Publication Number Publication Date
EP1606565A1 EP1606565A1 (de) 2005-12-21
EP1606565B1 true EP1606565B1 (de) 2006-12-20

Family

ID=32891753

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04704203A Expired - Lifetime EP1606565B1 (de) 2003-02-19 2004-01-22 Absorber für einen thermischen kollektor einer solaranlage sowie verfahren zu dessen herstellung

Country Status (10)

Country Link
US (1) US20060137679A1 (da)
EP (1) EP1606565B1 (da)
AT (1) ATE348988T1 (da)
AU (1) AU2004213524B2 (da)
CA (1) CA2513822A1 (da)
DE (2) DE10306930B3 (da)
DK (1) DK1606565T3 (da)
ES (1) ES2278299T3 (da)
PT (1) PT1606565E (da)
WO (1) WO2004074749A1 (da)

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DE102006003096B4 (de) * 2006-01-20 2012-05-31 Hydro Aluminium Deutschland Gmbh Modularer Sonnenkollektor
DE102007013919A1 (de) * 2007-03-20 2008-09-25 Werner Fischer Wärmetauscher für Solarthermie
DE102008052010B4 (de) * 2008-10-10 2014-06-18 Joma-Polytec Gmbh Solarabsorbermodul und Wärmetauscher
DE102009022059A1 (de) * 2009-05-20 2010-11-25 Schott Solar Ag Strahlungsselektive Absorberbeschichtung und Absorberrohr mit strahlungsselektiver Absorberbeschichtung
DE102009043986B3 (de) * 2009-09-11 2011-01-27 Hydro Aluminium Deutschland Gmbh Verfahren zur Herstellung von Solarkollektoren
AT509018B1 (de) 2009-10-29 2012-04-15 Dtec Gmbh Flachabsorber
DE102010017269B3 (de) * 2010-06-08 2011-12-08 Andreas Martin Hofer Wärmekollektormodul zur deckseitigen Montage auf einer Dachplatte
DE102011007616B4 (de) * 2011-04-18 2014-09-04 Sandvik Materials Technology Deutschland Gmbh Solarflachkollektor, Verfahren zum Herstellen eines Solarflachkollektors und solarthermische Anlage
DE102011050993A1 (de) * 2011-06-09 2012-12-13 ETA 86 Solar Steel AG Verfahren zur Herstellung eines Wärmetauschers, Wärmetauscher sowie Herstellanlage
CN107160133A (zh) * 2017-06-28 2017-09-15 江苏哈工药机科技股份有限公司 一种太阳能集热器生产用边框夹持推送设备

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Also Published As

Publication number Publication date
AU2004213524B2 (en) 2008-11-06
ES2278299T3 (es) 2007-08-01
AU2004213524A1 (en) 2004-09-02
WO2004074749A1 (de) 2004-09-02
EP1606565A1 (de) 2005-12-21
CA2513822A1 (en) 2004-09-02
ATE348988T1 (de) 2007-01-15
DE502004002374D1 (de) 2007-02-01
DK1606565T3 (da) 2007-01-29
PT1606565E (pt) 2007-03-30
US20060137679A1 (en) 2006-06-29
DE10306930B3 (de) 2004-10-14

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